Halloween Party

On Halloween night in Carbondale, Illinois, friends Harper, Bailey, Angela, and Mallory attend a party. The group befriends two college students, Evan and Nathan, the latter of whom flirts with Harper. Throughout the night, Harper, who is in an abusive relationship, suspects she is being stalked by a man in a devil mask. Later that night, the group attends a haunted house attraction. They are met by Clown, who makes them sign liability waivers and place their phones in a lockbox. Upon entering, they are met with a scene where a witch-masked woman burns a screaming girl's face with a hot poker. They reach a maze with two paths, one marked safe the other not safe. The group then becomes divided after Nathan, Angela, and Bailey take the safe route and the remaining take the not safe maze. In one room, Bailey's arm is slashed by a razor. The group, except for Mallory, reunites and panics after seeing the severity of Bailey's injury. Just after realizing that Mallory is missing, they are forced to watch as the Witch buries her poker in Mallory's head. Nathan leaves to retrieve their phones and is met by a man in a ghost mask, who appears to be a concerned employee named Mitch. Bailey, Harper, Evan, and Angela retrace their steps, eventually leading back to the crawlspace maze, which has a trapdoor in case too many people go at once. Evan goes first, followed by Mitch, who then seals Nathan inside the crawlspace maze. Devil suddenly appears and kills Angela. While fleeing, Bailey accidentally activates the trapdoor, dropping Nathan into the house's operation rooms. Evan escapes with Mitch, who removes his mask, revealing a heavily modified face before killing him. Nathan retrieves Harper's phone and texts their location to her abusive boyfriend Sam before escaping the house. Harper barricades herself in an escape room that resembles a child's bedroom, which triggers childhood memories of hiding under the bed from her abusive father. Harper uses a compact mirror to read multiple clues, written backwards on the wall, that direct her to find a key to open a door marked "The End". After she finally retrieves the key from a jack-in-the-box toy from under the bed, Devil forces his way into the room, but Harper stabs him in the eye with the key. When she then uses the key to open The End door, it triggers a shotgun to fire, hitting her in the shoulder. She crawls through a corridor to another door but is pursued by Devil. Realizing the gunshots are timed to the jack-in-the-box theme, Harper pushes Devil's head up just as the gun fires, killing him. Retrieving Devil's pitchfork, Harper fatally stabs someone dressed as a clown with a skull mask, only to learn after that it was a gagged Bailey. Sam arrives but is quickly dispatched by Clown. Harper incapacitates Zombie before helping Nathan kill Mitch. They encounter Vampire, who removes his mask, revealing an unmodified face. Vampire explains that the haunt's performers are part of an extreme body modification group that creates haunted house attractions to kill people. Vampire is shot to death by Zombie. Nathan and Harper kill Witch and Zombie then escape in Sam's truck. Clown burns down the attraction. At the hospital, Harper realizes that the group had filled out the liability waivers with their personal information, including their home addresses. Some time later, Clown arrives at Harper's mother's house. He gets stuck in a trap set by Harper, who emerges with a shotgun and shoots him.